Spinning frames provided with variable speed driving means



Apnl 22, 1958 w. LEUTERT 2,831,312

SPINNING FRAMES PROVIDED WITH VARIABLE SPEED DRIVING MEANS Filed June 27, 1955 II ll II II III I N ll] II II II II II I] [III] II wig ATTDHNEYs United States SPINNING FRAIVIES PROVIDED WITH VARIABLE SPEED DRIVING MEANS Walter Leutert, Geneva, Switzerland, assignor to Society Brematex, a corporation of Tangiers The present invention relates to spinning frames provided with variable speed driving means, the term spinning frame being meant to designate any frame including a plurality of spindles serving to the formation of so-called cops, whether said frame is for spinning proper or for any operation of the same kind such as twisting.

The chief object of this invention is to provide a frame of this kind which is better adapted to meet the requirements of practice than those existing at the present time.

Such frames include a ring rail vertically reciprocable relatively to a spindle rail in the direction of the axes of the spindles carried by said spindle rail and means for actuating this ring rail so that it reaches an end position (upwardly or downwardly) relatively to the spindles of the spindle rail at the end of the winding up of the yarn on said spindles. The present invention consists essentially in combining with the above mentioned ele ments means capable, when the ring rail reaches its end position, of automatically reducing the speed at which the spinning frame is driven to a given lower speed which is suitable for the subsequent underwinding operation of the finished cops.

It is known that this underwinding operation consists in forming on the base of every cop some supplementary turns of yarn intended to be partly unwound when the cop is removed from the spindle on which it was supported, whereby removal of the cop does not produce an unwinding of the normal charge of yarn on the cop.

Other features of the present invention will become apparent in the course of the following detailed description of some specific embodiments thereof with reference to the accompanying drawing, given merely by way of example and in which:

Fig. 1 diagrammatically shows, in side view with parts cut away, a spindle frame made according to the present invention.

Fig. 2 shows a portion of this frame on an enlarged scale in partial section on the line II-II of Fig. 1.

The spinning frame illustrated by the drawing is driven by an electric motor 1 the speed of which can be adjusted by displacement of the brushes thereof. This frame serves to the forming of cops made of conical layers and the last winding up turns of which correspond to an end position of the ring rail with respect to the spindle rail.

Such a frame includes a support constituted by uprights 2 connected together by casings 3 which contain the mechanism for driving spindles 4 mounted on a spindle rail.

A conventional ring rail 5 is guided with respect to uprights 2 so as to slide vertically for the formation on the cops of conical layers of yarn.

A supporting plate 6 is located on one of the sides of the frame. The driving shaft 7 of motor 1 is engaged in said plate, same as the shaft 8 which controls the displacements of the brushes of said motor in order to adjust the speed of operation thereof.

7 atom 0 2,831,312 Patented Apr. 22, 1958 ice According to the present invention, this frame further includes means adapted, when ring rail 5 reaches its uppermost position with respect to spindles 4, corresponding to the end of normal yarn winding up on said spindles, to slow down the speed of motor 1 automatically from its normal running speed to a given lower speed suitable for the subsequent underwinding operation.

For this purpose I provide, to control shaft 8, a hand wheel 9 rigid with a spindle 10 journalled in plate 6, this spindle 10 and shaft 8 being coupled together by a chain 11. Spindle 10 is connected with a fixed pin 12 rigid, with plate 6 through a spiral spring 13 which tends to rotate said spindle 10 in the direction corresponding to a reduction of the speed of the motor down to a position determined by an abutment 14 corresponding to the above mentioned lower speed of motor 1.

Spindle 10 carries, fixed thereto, a ratchet wheel 15 adapted to cooperate with a pawl 16 so that, when said pawl is operative, it enables spindle 10 to rotate only in the direction (indicated by the arrowon Fig. 2 corresponding to an increase of the speed of the motor.

Pawl 16 is carried by a lever 17 the free end of which carries a finger 18 located across the path of movement of an adjustable abutment 19 carried by the ring rail or at least participating in the vertical movements thereof. The Whole is arranged in such manner that this abutment 19 comes into contact with finger 18 and pushes it upwardly so as to disengage pawl 16 from ratchet wheel 15 When the ring rail 5 reaches its uppermost position, corresponding to the end of normal yarn winding up to form the cops.

It will be understood that when this movement of pawl 16 takes place, the ratchet wheel 15 is released and spindle 10 is rotated by spring 13 until abutment 14 stops its movement. The motor is thus caused to slow down to the above mentioned lower speed.

Subsequently, after the spinning frame has been stopped and hollow cops have been placed on the spindles, the operator again starts the spinning frame into operation and actuates hand wheel 9 so as to start motor 1 once more at normal running operation.

Advantageously, means are provided for preventing the starting of motor 1 as long as the parts are in a-position other than that corresponding to the lower speed of said motor. For this purpose, in the embodiment shown by the drawing, the push-button 20 which controls the starting of motor 1 is so arranged as to be masked by hand wheel 9 (in the form of a disc) and can be operated only when this wheel 9 is in the position corresponding to the lower speed of the engine. For instance, this wheel 9 is provided with a notch 21 through which push-button 20 can be actuated when said notch is opposite said push-button.

A spinning frame as above described has many advantages.

In particular, it obviates the drawbacks due to errors inherent in manual control.

It eliminates any loss of time when the frame is to be slowed down at the end of the winding up of the cops.

And it permits a smooth starting of the motor since the 3 What I claim is: r

1. In a spinning frame, the combination of a spindle rail to support cops and a ring rail vertically reciprocable relatively to each other, a motor operatively connected with' one of the two above mentioned parts for producing relative vertical movement of one part with respect to the other, means for varying the speed of said motor, and cooperating means carried by said two first mentioned parts for operating said means to slow down said motor in response to said ring rail reaching the end of its vertical displacement with respect to said spindle rail Which corresponds to the winding up of yarn on said cops. 2. In a spinning frame, the combination of a fixed support, a fixed spindle railto support cops, a ring rail reciprocable vertically with respect to said spindle rail, a motor operatively connected with said ring rail for driving it vertically with respect to said spindle rail, means for varying the speed of said motor and cooperating abutment means carried by said fixed support and said ring rail for operating said means to slow down said motor in response to said ring rail reaching the end of its vertical upward displacement which corresponds to the winding up of yarn on said cops.

- 3. In a spinning frame, the combination of a fixed support, a fixed spindle rail to support cops, a ring rail reciprocable vertically with respect to said support, a

motor operatively connected with said ring rail for driving it vertically with respect to said spindle rail, a member, carried by said support, for controlling the speed of said moton-this member being movable from a position corresponding to normal running speed of said motor to a position corresponding to a given lower speed, elastic means for urging said member toward the second of said positions, pawl and ratchet means arranged to keep said member in the first of said positions after it has been brought therein, and cooperating abutment means carried by said fixed support and said ring rail for releasing these pawl and ratchet means when the ring rail reaches its uppermost position corresponding to the end ofyarn winding on the cops.

4. A spinning frame according to claim 3 further comprising means for restarting said spinning frame operative only when said control member is in said second mentioned position, corresponding to the lower speed of said motor.

References Cited in the file of this patent UNITED STATES PATENTS 

